*{
    margin: 0;
    padding: 0;
    list-style: none;
}
.t-center{
    text-align: center;
}
.border1{
    border:1px solid  red;
}
.f-l{
    float: left;
}
.f-r{
    float: right;
}
.cursor{
    cursor: pointer;
}


.margin{
    margin: 0px auto;
}
